Corporal

I'm fully capable of modifying the Spore item palette but, I ran out of space with pages which fit some of the parts. How can I make a new page in the mouth section using SporeModder? I have done it previously with a different mod I was working on but, haven't been able to duplicate the process.

The instanceid of the palettePagePartParentPage property in the former file should be the name of the latter file (without the extension, of course). The latter file's name should also have an entry in your mod's creature_editor_palette~ file (which should, in turn, be named after your mod in some obvious way, so as to prevent conflict with other mods, so for example, "ce_lavaSpore_parts" would work for you. You only need one such file in your mod, as you can include entries for as many pages as you want in just one file.)